Malicious PDF — malware analysis report

Static analysis result for SHA-256 743167fa8b61a08c…

MALICIOUS

PDF

87.5 KB Created: 2021-04-04 01:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01e275c276054d1e6a0493a97920077f SHA-1: 701c596ee02121381f377d94a7a587e8d171035e SHA-256: 743167fa8b61a08c4a0d53f59ba57081de6d279590e1ba91ded08f35dca23411
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/123?utm_term=cyberpatriot+training+round+answers PDF link annotation
    • http://zuzatew.medianewsonline.com/36068827921.pdfIn PDF document text
    • http://pofefazuvalime.iblogger.org/16355181074.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/paluzemarewabirujoxu.pdfIn PDF document text
    • http://wafenov.iblogger.org/je_me_dbrouille_en_anglais_apk.pdfIn PDF document text
    • http://gabonilud.22web.org/bubugagijesogenirebavu.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/pdf_acrobat_reader_dc_ocr.pdfIn PDF document text
    • http://bunagutafa.getenjoyment.net/26837733198.pdfIn PDF document text
    • http://novijixonusasu.mywebcommunity.org/angielski_w_tumaczeniach_medyczny_chomikuj.pdfIn PDF document text
    • http://wajofima.mywebcommunity.org/20390411021.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/noam_chomsky_who_rules_the_world_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/varolexexus/93253981993.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/39652429500.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/lajel.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/holy_bible_in_gujarati.pdfIn PDF document text
    • http://nelosizodi.rf.gd/giwodubebilusuga.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/91559765671.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/bavapulu.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/97749356379.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/nagowezivijolifa.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/veseroniwesujime.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/l._s._bobrow_fundamentals_of_electrical_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/aicc_full_form_in_economics.pdfIn PDF document text
    • http://kojomazudogog.epizy.com/50275925004.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/jidixajovutolupidu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11544 5336 bytes
SHA-256: c20dafa715023c79cc677ff2115f07ee863808ee4487ebd9806b32b78077d448
font_01_sfnt_off00012781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12781 11908 bytes
SHA-256: 128e18cbc9e298484a657350f41e1a6ee256bdc3d392d13b85e154935bb381bc

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